CIDR associates network masks with IP network numbers independent of their traditional class. Routers that support CIDR recognize these networks as individual routes, even though they may represent an aggregation of several traditional subnets.Also Known As: Classless Inter-Domain Routing, Classless Internet Domain Routing, supernettingExamples:CIDR shorthand notation writes an IP address and its associated network mask in the form xxx.xxx.xxx.xxx/n, where 'n' is a number between 1 and 31 that is the number of '1' bits in the mask.

CIDR Stands for classless internet domain routing. It helps in preventing the wasting of IP address and nowadays we are facing the shortage of the IP address.So this CIDR helps to prevent the waste of IP address.Shortly IPV6 will come into exist....

CIDR associates network masks with IP network numbers independent of their traditional class. Routers that support CIDR recognize these networks as individual routes, even though they may represent an aggregation of several traditional subnets.Also Known As: Classless Inter-Domain Routing, Classless Internet Domain Routing, supernettingExamples:CIDR shorthand notation writes an IP address and its associated network mask in the form xxx.xxx.xxx.xxx/n, where 'n' is a number between 1 and 31 that is the number of '1' bits in the mask.

The Classless Inter Domain Routing (CIDR) standard is already in effect and most newer routers supports it. In a few years it is likely to be the way IP addressing is handled. It is already becoming common for ISP and major providers to use this scheme.

CIDR is an efficient method for specifying IP addresses to Internet routers. CIDR was developed to cope with the surge in demand for IPv4 Internet addresses in the 1990s.Before CIDR, Internet routers used an inefficient IP addressing scheme based on classes.